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An Algorithm for Visualization of IDL Polar Vector Field

A vector field and land technology, applied in the field of process algorithms, can solve the problem of difficult visualization of polar vector fields of the ivector function, and achieve the effect of avoiding misidentification of the data range and facilitating operation.

Active Publication Date: 2021-01-12
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0003] In view of the limitation of the ivector function in the above-mentioned IDL software, the problem that the visualization of the polar vector field is difficult, the object of the present invention is to provide a process algorithm for visualizing the polar vector field using the IDL programming language

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  • An Algorithm for Visualization of IDL Polar Vector Field
  • An Algorithm for Visualization of IDL Polar Vector Field
  • An Algorithm for Visualization of IDL Polar Vector Field

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, an algorithm for IDL polar vector field visualization reads vector field data and longitude data, interpolates the two data to a uniform grid size, and converts two-dimensional data with asymmetric geographical range into It is one-dimensional data, which avoids the problem that the ivector function misidentifies the data range. Create a layer display window, set the projection and geographical range of the data, insert the land layer and the graticule layer, use the visualization function to visualize the polar vector, superimpose all layers, and generate the polar vector field map, including the following steps:

[0030] Read geographic longitude data LON, latitude data LAT, and vector field V-direction data and U-direction data and perform interpolation processing, so that the numbers of rows and columns of the two data are the sa...

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Abstract

The invention relates to an algorithm for IDL polar region vector field visualization, and the algorithm comprises the steps: reading vector field data and longitude data, carrying out the interpolation of the two kinds of data, enabling the resolutions of the two kinds of data to be consistent, converting the asymmetric two-dimensional data of a geographical range into one-dimensional data through data dimension conversion, building a layer display window, setting the geographical range of projection and data, inserting a land layer and a graticule layer, carrying out the visualization of a polar region vector through a visualization function, overlapping all layers, and generating a polar region vector field map. The method is used for the IDL polar region vector field visualization, andovercomes a difficulty in the visualization of the asymmetric vector field data visualization of the geographical range.

Description

technical field [0001] The invention relates to a process algorithm for visualizing polar vector field by using IDL programming language. Background technique [0002] The IDL programming language is powerful and widely used in aerospace, remote sensing and geo-information fields. Researchers use IDL to plot vector fields Figure 1 Generally use the built-in function ivector, but ivector has obvious limitations when visualizing vector fields. When the data range is geographically asymmetric, such as figure 2 , if the red box is the geographical range of the data, the latitude and longitude of the four corners are as follows figure 2 shown. When ivector performs visualization, it needs to input the minimum latitude, minimum longitude, maximum dimension and maximum longitude of the geographical range of the data, that is, the minimum latitude, minimum longitude, maximum dimension and maximum longitude of the four corners of the red box are used as parameters of ivector, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/20
CPCG06T11/206
Inventor 王云鹤毕海波黄海军
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI